Front guide for printing-presses.



L. BAKKE.

FRONT GUIDE FOR PRlNTI-NG PRESSES.

APPLICATION FILED JUNE2,1911v Patented Dec. 5, 1911.

LEoPoLn BAKKE, or CHICAGO, ILLINOIS.

FRONT GUIbE FOR PRINTING-PRESSES.

Specification of Letters Patent.

Application filed June 2, 1911. Serial No. 620,936.

To 1121 whom 'it ma y concern:

Be it known that I, Lnoronn BAKKE, a citizen of the United States, and aresident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Front Guides forPrinting-Presses, of which-the following is a full, clear, and exactspecification.

My invention is concerned with front guides for printing presses, and isdesigned to produce a simple device of the class described in which theposition of the stop plates can be quickly adjusted to any desireddegree of nicety, and securely and quickly locked in said adjustment.

To this end, my invention is embodied in a simple construction to behereinafter described, and the novel combinations pointed out in theannexed claims.

To illustrate my invention, I annex hereto a sheet of drawings, in whichthe same reference characters are used to designate identical parts inall the figures, of which,-

Figure 1 is a side elevation of a portion of a rotary press having afront guide embodying my invention applied thereto; Fig. 2 is a verticallongitudinal section through the guide on an enlarged scale; Fig. 3 isan end elevation showing the stop plate; Fig. 4 is a section on the lineA-A of Fig. 2, looking to the left; Fig. 5 is a similar view looking tothe right; and Fig. 6 is a top plan view looking down on the adjustingmechanism.

\Vhile my invention may be used with any sort of a printingpress, I haveshown it as applied to a rotary press in which the guide is mounted onthe rock shaft 10 having the arm 11 rocked by the cam 12 to remove theguide from the path of the paper 13 when necessary. The supportingmember of the guide consists of a sleeve 14 adapted to fit on the rockshaft 10, and which is split through at least one end and provided withlugs 15 and 16 which are adapted to be drawn together by the thumb screw17 so as to clamp the sleeve in any desired position on the rock shaft10. This clamping sleeve has secured thereon, and preferably formedintegral therewith and at right angles thereto, the sleeve 18, which isclosed at one end except for the aperture 19, through which the rod 20slides. This rod has secured thereon, preferably at its outer end, thestop plate 21, which may be of any desired form, and is convenientlyheld in place by the screw 22 threaded into the end of the rod so as tofastenthe plate in place, it being prevented from turning on the rod byreason of the squared end thereoffitting in the correspondingly squareaperture in the plate. The sleeve 18 is provided with apertures 23 and24, in which the pin 25 passed through the rod is adapted to reciprocateas may be necessary in threadjustinent of the position of the rod, whileat the same time preventing the rod from turning or rotating in thesleeve. The other end of the rod is threaded and passes freely throughthe non-threaded aperture 26 in Patented.- Dec. 5, 1911.

the cap 27 which is screwed on the end of the sleeve to close that end.The cap 27 has a plurality of equidistant apertures 28 therein, whichare adapted to cotiperate with the pin or projection 29 extending fromthe disk 30 which is threaded on the end of the rod 20.

The operation of my improved guide will be readily apparent: To hold thedisk 30 securely against the face of the cap 27 and prevent any possibleunintentional displacement of the position of the disk 30, I place thehelically-coiled expanding spring 31 in the sleeve 18, one end of itabutting against the pin 25 and the other'against the inner surface ofthe cap 27, so that the disk 30. is held firmly in the desiredadjustment by the engagement of the pin or lug 29 with one of therecesses 28. Supposing that the threaded end of the rod 20 hastwenty-four threads to the inch and there are three of the recesses 28,each time that the disk 30 will be adjusted one point or 1/72 of aninch. Two complete turns of the disk 30 will give an adjustment of onenonpareil, or 1/12 of an inch, While four complete turns will give anadjustment of one pica, or 1/6 of an inch. When the first sheet is runthrough, and it is found that the guides need adjustment, the amount ofthe adjustment needed can be estimated from the impression and all thatis necessary is to pull the disk 30 outward against the resistance ofthe spring 31 until the pin or lug 29 is disengaged from the recess 28,when it can be turned as far as may be necessary, the passing of the pin29 from one recess 28 to the next one indicating the adjustment of onepoint, and the turning of the disk through 360 giving an adjustment ofthree points, and so on, the milled surface of the disk being providedwith the mark 32 and the cap 27 being provided with the mark 33, so thatevery time a complete rotation of the disk 30 is made that fact will beindicated by the coincidenceof the marks 32 and 33. Of course, it willbe understood that any markings indicating the nature and amount of theadjustment that may be desiredcan be provided.

While I have shown and described my invention as embodied in the formwhich I at present consider best adapted to carry out its purposes, itwill be understood that it is capable of modifications. and that I donot desire to be limited in the interpretation of the following claimsexcept as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of theUnited States. is:

1. In a front guide for printing presses. the combination with aguide-supporting member, of a rod movable longitudinally thereon. a stopplate carried by the rod, 0 spring for holding the rod in its advancedposition. mechanism for adjusting the posi tion of the rod relative tothe guide-supporting member, and means for locking said adjustingmechanism in any position to which it may be adjusted to prevent anyaccidental change of the adjustment, said means being held in action bythe spring the tension on the spring.

.2. In a front guide for printing presses. the combination with asleeve. of a mounted to slide. but not rotate therein. and threaded atone end. a stop plate secured on the other end. a. disk threaded on therod outside of the sleeve. graduated engaging means on the com-tingsurfares of the sleeve and disk to prevent any relative angular movementof said surfaces while they are engaged. and a pring in the sleeveabutting against one end thereof and against the rod I l l l 3. In afront guide for printing presses, the combination with a sleeve, a capclosing one end thereof, a rod mounted to slide freely through saidsleeve and cap and threaded at the cap end, a disk threaded on the rod,graduated engaging means on the coacting surfaces of the cap and disk,and a spring in the sleeve abutting against one end thereof and againstthe rod to hold said coacting surfaces yieldingly in engagement.

4:. In a front guide for printing presses, the combination with a sleevehaving a longitudinal slot therein, of a cap secured on one end thereof.a rod mounted to slide freely through the sleeve and cap threaded on thecap end. a stop plate on the other end,

a disk threaded on the rod adjacent the cap,

eqnidistant'recesses in the cap, a pin on the disk cooperating with therecesses, 21. pin carried by the rod cooperating with the longitudinalslot in the sleeve, and a spring in the sleeve surrounding the 'rod andcon tacting with the cap at one end and the pin at the other end,substantially as and for the purpose described.

5. In a front guide for printing presses, the combination with a.guidesupporting member, of a rod movable longitudinally thereon. a stopplate carried by the rod, a

spring for holding the rod in its advanced position, micrometermechanism for adjustand being releasable by merely mcreasmg ing theposition of the rod relative to the guide-supporting member graduated sothat the extent. of the ad ns-tment can be accurod i rately determined.and means for locking said adjusting merhanisn'i in any position to holdsaid engaging means in engagement Q to which it may be adiusted toprevent any accidental change of the adjustment.

In witness whereof. I have hereunto set my hand and aflixed my seal. thi26th day of May, A. I). 1911.

LICOIOLD BAKKE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

